docs: def load_module(self, fullname):
          """
          Returns an object that lazily looks up tables and groups.
          """
          mod = sys.modules.get(fullname)
          if mod is not None:
              return mod
  
          # We're creating an object rather than a module. It's a hack, but it's approved by Guido:
          # https://mail.python.org/pipermail/python-ideas/2012-May/014969.html
  
          mod = _from_core_node(self._store, self._root)
          sys.modules[fullname] = mod
          return mod